Portal:Minerals/Did you know/5

• ... that the rare mineral Matlockite (PbFCl) (pictured) is named after a town in Derbyshire?
• ...that the amorphous phosphate mineral santabarbaraite was named after the Italian mining district Santa Barbara where it was discovered in 2003, but its name also honors Saint Barbara, the patron saint of miners?
• ...that when yellow crystals of mosesite, a very rare mineral found in deposits of mercury, are heated to 186 °C (367 °F), they become isotropic?